I make it 23 on the originals Geoff, 28 on mine I think....
Certainly a thicker gauge wire used mate, another good indicator and top tip!
The thing that niggles me to a degree, is that people fake these up and pass them off as original .... I know, buyer beware and all that, but, I bought mine from a very well known and reputable UKdealer, who clearly gave me some made up snake oil bullsh*it to go with it for good measure!
Absolutely nothing wrong with a good repro, but when it's taken as far as mine, it's clearly meant to deceive.
Buyer beware I guess....
At £50, I've got a very good repro, that I'm more than happy with.